Which nyc train goes under a bridge?

Question

I was in the seaport in nyc and i saw a trian riding underneath a bridge? i wanna know which train it is and which bridge it is. Help me!

Answer 1

if you were on the west side, and looking uptown at Brooklyn, you probably saw the Manhattan Bridge, and you saw the subway go across it.  The N and Q trains on the south side of the bridge, and the B and D trains on the north side.  I hope this has been helpful...it is the only bridge in the vicinity that carries any form of train across a body of water.

Answer 2

the subway